Extended CLI added Enable / Disable commands.

An alternative to UI's Start / Stop buttons.
Updated changelog.
Merge pull request #7 from mchf/master

Extended CLI added Enable / Disable commands
firewall.ycp - move the include statement to the top

Ycp to Ruby translation (y2r) does not support non-toplevel includes
Merge pull request #8 from lslezak/master

firewall.ycp - move the include statement to the top